Dump-car.



R. M. ZIMMERMAN.

DUMP GAR, APPLICATION FILED AUG. 26, 1'910A R. M. ZIMMERMAN.k

DUMP GAR.

1 APPLIGATION FILED AUG.26,1910.

4 snEnTs`-sBmT zA Patented NOV.` I4, 1911.1.

l* gnu ydo@ 3m RQM. ZIMMERMAN.

DUMP GAR. APPLICATION FILED AUG.26,1910.

Patented Nov. 14, 1911.

4 SHEETL-SHEET 34 R. M. ZIMMERMAN. DUMP GAR.

` APPLICATION IILED AUG. 26, 19101 Patented Nov. .111, 1911.

4 SHEETS-MEET 4l UNITED STATES ll/YEIVIr OFFICE.

ROBERT MONTAGUE ZIMMERMAN, OF MONTREAL, QUEBEC, CANADA, ASSIGNOR TO NATIONAL DUMP CAR COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION 0F MAINE.

Specification of Letters Patent.

Iatel'ltcd Nov. 14, 11H1..

Application filed August 26, 1910. Serial No. 579,141.

-ity discharge doors for the said opcnine,

and the-invention may be said to consist of the construction, combination. and particular arrangement of part-s hereinafter de-l scribed and pointed out in the claims. For full comprehension. however ot my inven tion reference must be had to the accompanying drawings forming a partY ot' this specification in which similar reference characters indicate the same partsY and wherein:

'Figure 1 a transrersc `vertical sectional View ot' a car constructed 'according to my invention, the section beingl taken on line A. A, Fig. 3; Fig. a longitudinal vertical sectional View ot one end of the car, taken on line B. lf, Fig. l; and Fig. 3V is z. plan View of the underside of the car with thecnds broken away. Fig. l is an enlarged detail` transverse sectiontaken on line 4 l Fig. 2.

ln the-car. illustrated the body 'comprises a floor frame consisting ol a pair of side' sills l), end sills c, longitudinal intermediate sills el, and auxiliary sills rz a and 62,63 situated transversely between the `sills fl Z and 'the sills (l and 'b respectively, and the saper structure carried b v this 'tloor fra-me comprises inclined end Ihopper walls f and side walls consisting ot' vertical and inclined non lions f7 and h respectively, the longitudinal intermediate sills d and auxiliary sills e having' the hopper walls fastened thereto and formingr the frame of the discharge opcninlgr of the ear.

The doors. and y', are l'iinged as at.- Zf to the sills (l forming the sidesol the discharge opening, and arc pro-vided on their under side with railsI |n'e'sentin;r tread surfaces m n the latterof which. when the doors are closed,` converge. slightly toward support.'- ing rails o suspended troni vthe ll'oor ytraming. The doors are operated by laterally movable shafts p'and 71 in conjonction with the supporting rails 0, the' 'a ils on the allow one pitnian to pass the other.

mn'lerside of the doors and unitary gear 'opL ,'oiii1le1--sliatts u are situated one at each* end ol the doors and to one sido of the meeting' point of such doors and abore the railsI wh ich support the shaft j), each shaft beingr rotatively supported in a pair ott lvarings r and e suspended' respectively troni the auxiliary sills c and e. i-lr pair ot' crank arms 'ze and 'zo' are rigidly mounted on these shafts. the ends of the. crank arms being connected to the shafts p ard 7)' respectively, by pitmen :u and y of ehzmnel crosssection. the arms Aic `and w of each pair being formed on a common tmb and arranged outot' line withvone another to i The pitmen 3,/ are of greaterflength than the pitmen .r so as to compensate for thogreater distance between the shaft, ll' "ind the counter-shafts u than between the shaft y and these counter-shafts. Sprocket wheels L. of greater diameter than th'e sprocketwheels t on the shaft S, are rigidi) mounted upon the counter-shafts u between the crank-arms c and the bearings 1: and are operatirelv connected to the said `sprocket wheels t by chains 3. The shaft H is rotated by alcrer 5 tu-lcrumed thereon and carrying a weighted pawl (l which engages a ratchet wheel 4 monntcd rinicllia on the shaft. while a. dclent pawl T engages another ratchet wheel on the shat't lio lock tic latter against reverso rotation.'

Operation: .Vlicn it is desired to closeth doors the shaft S is rotated in the direction ot arrow l0 thus operatingr the' crank' arms,4

by means of the `sproclwt-wheels and chains,

and pulling;r the shafts p and 7) up their ref,

spectire supportingV railsI and raining the doors tolhcir closed position, the shafts be comingr wedged between the cmivergingsurfaces of the rails o and the portion n of the rails on the underside of the doors thus locking the doors in their closed position. To ol'i'en the doors the sha'tti is rotated inthe opposite direction wliich,calises tl'e crank arms to pull thef'shafts y) and p. from their pitmen operatively' 3 0 counter-l pair of doors, laterallymovable door supporting` shafts, a main shaft and means for operating the same, of a' pair of countershafts supported one at each end of the doors; a pair of crank arms on each countershaft; pitm'en operatively connecting the crankarrns to the door supporting shafts, and means connecting thecounter-shafts to the main shaft.

3. In a dump ear, the combination with a pai-r of hinged doors, laterally movable door supporting shafts a main shaft and means for operating the same, of a pair of countershafts supported one at each end of the doors; a pair of double crank arms on each aft; pitn'ien operatively connect.- ing the opposite'endsof the double crank arms to the door supporting shaft-s, and means connecting the counter-shafts to the main shaft.'

the door supporting shafts; sprocket Wheels upon the counter-shafts and main shaft respectively; and chains operatively connecting the sprocket Wheels.

6. In a dump-car, the combination With a pair of hinged doors, laterally movable door supporting shafts and a main shaft, of a pair of counter-shafts; bearings suspended from the car at each ond of the doors and at one side of the center of the car and rotatively supportinr.,r the counter-shafts, a pair of double crank arms on each counter-shaft and disposed in diierent vertical. planes; pitmcn operatively connecting the opposite ends of the double crank armsI to the door supporti-ng shafts; sprocket wheels upon the crank arms and main shat't respectively; and chains o}'r eratively connecting the sprocket Wheels.

7. In a dump car, the combination with a pair of hinged doors having contiguous free sides when closed, of operating means therefor, including a pair of lever larms fulcrumed adjacent the free sides ofi the doors when closed, operating mechanism applied to such lever arms, and means whereby such arms operate the doors, including laterally movable members connected to such arms and adapted to move across the undersides of the doors.

8. In a dump car, the combination with a lpair of hinged doors having contiguous free sides when closed, of a pair of door operating and supporting shafts upon which the doors rest. freely, and a pair of lever arms `tulerumed adjacent the free sides of the doors when closed, a unitary operating mechanism for the said lever arms, andv means whereby such arms operate the said shafts.

9. In a dump car, the combination with a 35 4. In a dump car, the combination with a pair 'of '.inged' doors, laterally movable door g shafts a main shaft and means Y l pe titngfthe same, of a pair of countershafts si-,pporte'd at the ends of the doors; 40 a' pair of double crank arms on each countershat and disposed in different vertical planes; operatisvely connecting the opposite e ds of' the double crank arms to the door-"sapporti Ashafts, and 'meanscon- 45 neet-ing thecounter-shafts tothe main shaft.

5.' In a dun-rpcar, the combination with a pair of hin ged doors, laterally movable door supporting shafts a ina-in shaft and means for operating' the same, of a pair of counter- 50 shafts supported at the ends of the doors; a

pair-of double crank arms on each countershafti and' disposed in different vertical planes; pitmenoperatlvely connecting the opposite ends of the double crank` arms to pair of hinged doors, of operating means `including a pair of door operating and supportingr shafts upon which the doors rest freely, a pair of lever arms, operating mechahism for suc-h arms, and tension links con- 100 meeting such arms with the said shafts.

In testimony whereof, I have signed my name to this specication, 1n the presence of tivo subscribing witnesses.

ROBERT MONTAGUE ZIMMERMN. IVitnesses z STANLEY C. KING, 'FRED J. SEARS. 

